Mercurial > cpython-lru_cache-weakref

diff Python/compile.c @ 24373:f79c7aae6620 legacy-trunk

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remove spurious SET_LINENO from com_list_for and com_list_if. All they do is slow things down unnecessarily and make tracing much more verbose. Something like def f(n): return [i for i in range(n) if i%2] should have at most two SET_LINENO instructions, not four. When tracing, the current line number should be printed once, not 2*n+1 times.
author Skip Montanaro <skip@pobox.com>
date Thu, 25 Jul 2002 06:18:42 +0000
parents f7ce696979e1
children 3444005b6527
line wrap: on
line diff
--- a/Python/compile.c	Wed Jul 24 19:13:08 2002 +0000
+++ b/Python/compile.c	Thu Jul 25 06:18:42 2002 +0000
@@ -1376,7 +1376,6 @@
 	com_node(c, CHILD(n, 3)); /* expr */
 	com_addbyte(c, GET_ITER);
 	c->c_begin = c->c_nexti;
-	com_addoparg(c, SET_LINENO, n->n_lineno);
 	com_addfwref(c, FOR_ITER, &anchor);
 	com_push(c, 1);
 	com_assign(c, CHILD(n, 1), OP_ASSIGN, NULL);
@@ -1395,7 +1394,6 @@
 	int anchor = 0;
 	int a = 0;
 	/* list_iter: 'if' test [list_iter] */
-	com_addoparg(c, SET_LINENO, n->n_lineno);
 	com_node(c, CHILD(n, 1));
 	com_addfwref(c, JUMP_IF_FALSE, &a);
 	com_addbyte(c, POP_TOP);